4.8 is tpms light(SOLVED)
 

Hi guys, newbie here & I have searched & searched for a solution to my issue so go easy😁
I recently deleted the air suspension on my 2005 4.8is uk car in favour of a set of bc racing coils, I also bought bmw scanner 1.40 to delete the suspension inactive message from the dash😎 trouble is now my tpms light wont stay off..even if I clear the codes with Inpa or dis57 it always comes back on(yellow/orange) within feet of driving off? tyre sizes & pressures as suggested i.e. 2.2bar & 2.4 bar front & rear, no abs lights or anything just the tpms light, can I get rid of this anyway with INPA, DIS57 or BMW scanner 1.40?
thanks in advance
Lee

Turn the ignition on an press and hold the TPMS button on the center console above ashtray for 10-15 seconds. The light should go out. Test drive to highway speeds and verify no light returns. :thumbup:

Thanks for the reply buddy but I have tried that too & it always rears it's head again usually after 60mph?

Try clearing it and then press for 5 seconds until the light lights up and then begin driving.

Hmmm never tried it that way before, will give that a go, 🤞cheers again

Check the ride height sensors under the car, they trigger the light if they're damaged or sitting wrong. Maybe they got knocked when you changed the suspension....

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Spot on with this mate many thanks 👌🏻👍🏻I'm a bit ocd & this was driving me nuts, turns out the car was too low & it was indeed the ride height sensors causing the tpms light to come on, I had just left the BC coilovers @ the height they came set @ from the supplier & although it looked & drove great it was too low for the sensors as yesterday I had the chance to try raise them a bit so went 20mm up allround from where they were & it's all good now😁😎

I've tried & failed numerous times to upload a pic of it as it was height wise when it was giving me trouble but all my files are too large🤔

That's good to hear! Glad I could help. [emoji106]
With so many chosing to convert their suspension I think the majority are going to encounter this problem. Add the word "Solved" to the title of the thread and hopefully it will help future converts :)

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Mine is on too.
Air is deleted and I used INPA to tell the dash not to warn me of it.
When I try to read the tpms error. It says module can't be read. Any ideas? Worked fine before i told the dash to ignore the air suspension inactive error.


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As I said above my suspension was too low & I also couldn't read module with any of my software either before or after deleting the air ride but if I cleared the susp.inactive fault in EHC2 the light went out temporarily however now I've raised the car 20mm the tpms functions as it should & thats without clearing the susp.inactive error. HTH

Oh. Didn't see that you couldn't read the module also.
Well I'm on H&R springs. So there's no raising the height for me. That said it's been on springs a while now, but the light just came on a few months now.


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Maybe worth having a little look @ your sensors buddy, maybe a bad one or knocked or seized arm or something...you haven't had it jacked up or on a 2 post ramp or anything recently presumably?
Hope you get to the root of it as I know how frustrating it can be.

Yeah. I initially thought that's what it was. Then I saw this post. Now I again think it might be that.


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I installed BC coilovers last year and have had both the TPMS and the error message ever since. I tried to disable the error message using BMW scanner but it didn't seem to work. Can you share EXACTLY what you clicked/disabled? I tried turning error messages off in the light control module but apparently that still didn't solve it.

As for the TPMS, that's interesting that you believe the ride height sensors triggered it. Being able to slightly lower the vehicle is part of the benefit of coilovers. Anyway to disable this without having to raise the vehicle?

Yeah. Kinda weird they'd tie it together like that. I mean realistically why is the ride height a trigger for the tpms if it has 4 sensors. If anything, they should have used the speed sensors as a back up. Not the ride height.


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There are no TPMS sensors, BMW uses the wheel speeds as the primary sensor.

Are you sure about that?
I've been made to understand that some E53s have wheel sensors.


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I won’t speak for all E53’s but my 2005 4.8is does not have tire pressure sensors.

Interesting. Now I'm really not sure why mine is on then. Suspension has changed, height or otherwise. Yet suddenly the tpms light is on, and won't go out. Won't reset and can't read/detect the module.


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Then I saw these earlier and I'm now I'm all like wtf!?
http://www.tpmsdirect.com/mobile/Product.aspx?id=661


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4.8 is tpms light(SOLVED)
 

So confused. Now this. This is also saying they're basically sensors per wheels. Let me compare what it says about the e46 which I absolutely know uses speed sensors to function.
--------------------------

Tyre pressure control (RDC)

Introduction
The task of the tyre pressure control system is to remind the driver in good time to check the tyre pressure as it decreases and to warn him in the event of a flat tyre. The RDC system therefore enhances vehicle safety and convenience for the driver. Nevertheless, decision priority and responsibility remain with the driver.

Advantages:

- Increased driving safety by early warning in the event of rapid pressure loss

- Tyre damage caused by excessive flexing in conjunction with low tyre pressure is avoided

- Deviations from set tyre pressure are monitored

- Slow pressure loss is recognized in good time

Components:

- Control unit for signal evaluation

- One receive aerial per wheelhouse

- Wheel electronics with valve

- Initialisation button

Messages to driver
Soft warning: This operating status is characterized by a minimum tyre pressure (0.2 bar under set pressure) at which driving safety is still ensured. The driver is requested via the check control to correct the pressure.

Hard warning: Driving safety is no longer ensured, the driver is requested to check the tyres immediately.

A hard warning is active when the pressure loss drops either 0.4 bar or 16% below the set pressure value or drops below a value stored in the control unit.

Important
Initialisation must always be carried out after every tyre pressure correction. For this purpose, the initialisation button is pressed (min. 6 seconds) with the ignition switched on until the "tyre pressure set" appears in the check control. After several minutes driving time during which the system carries out wheel identification and a plausibility check, the RDC adopts this tyre pressure as the setpoint to be monitored.

Important
The following display texts can appear in the check control: Tyre pressure set, tyre monitoring inactive, check tyre pressure, tyre failure, tyre failure front right, tyre failure front left, tyre failure rear right, tyre failure rear left

System description
The wheel electronic units are mounted within the tyres and measure the tyre pressure as well as the tyre temperature. The measured data are sent from the wheel via an output stage in the wheel electronic unit. The power is supplied by a lithium battery in the wheel electronics. Each electronic control unit features its own code which is also sent during each data transfer.

The data sent by the wheel electronic units are received via aerials mounted in the wheelhouse and transferred via shielded cables to the control unit.

As part of the wheel identification procedure, the system automatically learns what wheel electronic units belong to the vehicle. This function ensures that data from another vehicle cannot be evaluated.


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Verify which system you have - TPMS or FTM.

TPMS will have a pressure sensor and transmitter in each valve stem - they look rather different from a regular rubber and brass valve stem...

http://www.team-bhp.com/forum/attach...ru-ag-tpms.jpg

Note that parts A & B, along with the left end of part C are inside the wheel and not visible without removing the tire from the rim. NEVER undo part E unless you have the tire off the rim! :D

With FTM you will have the regular rubber and brass valve stem (although there are metal versions around).

If you have the FTM system, which uses wheel speed sensors to calculate tyre rotational speed differences, you won't get a response to queries on the TPMS module with INPA etc. as there is not one fitted.

If you have TPMS, then there maybe an issue with one or more of the sensors and further diagnostics is required. I think the batteries in the sensors are good for a quite a ling time but they can (and do) eventually go flat, requiring the sensor be replaced.

Aahhhhhhhhhh. Ok. Ok. Thank for that clarification on the module. Makes sense now.
I think I have rubber FTM valves. Will have a look see at some point.

If it is indeed FTM, and my ride height has not changed. Why the hell cant I reset it then?


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Perhaps one tyre is flat...? ;)

But being serious, have you tried the correct reset procedure as outlined by Overboost (originally from QSilver7)on post #4 of this thread...?

Yep. I sat in there with the manual and tried it and nothing. Light will not go away. Doesn't flash. Nothing. It's like it's broken or some shit. Which makes no sense as I have no abs do dsc errors.

Maybe I can't read. I'll have the woman try it. Since she will do exactly as she reads.


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Hey Snik...you ever find resolution to your FTM issue. My FTM light is what ultimately did in my air susp setup (moved to H&R + Bilstein B6). That being said, my stupid FTM light has remained on no matter what I try to do to reset it. I had my ride height sensors checked within a few months of issues and they checked out (swapped with a new one on each side, independently, to get a ride height reading) so I *think* my issue does not relate to those...but could it possibly be one of my ABS/DSC sensors or probably not since I have no errors for those? How is your issue going?

Adam

Nope. It goes away for a few days if the vehicle is without the battery. Then comes back all fierce and shit. I don't even pay attention to it anymore

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